import * as cryptoJs from 'crypto-js';
import { RawAxiosRequestHeaders } from 'axios';
import path from 'path';
import * as fs from 'fs-extra';
import IHelper from '@/services/helper.service';

export type DyHelperRequest = {
  method: string
  headers: {[prop: string]: string}
  params: {[prop: string]: string | number}
  pathname: string
  region: string
  timeout: number
  custom?: string
  url: string
  body?: {[prop: string]: any}
}

var A = ["authorization", "content-type", "content-length", "user-agent", "presigned-expires", "expect", "x-amzn-trace-id"]
  , c = "aws4_request"
  , l = function(e) {
  try {
    return encodeURIComponent(e).replace(/[^A-Za-z0-9_.~\-%]+/g, escape).replace(/[*]/g, (function(e) {
        return "%".concat(e.charCodeAt(0).toString(16).toUpperCase())
      }
    ))
  } catch (e) {
    return ""
  }
}
  , u = function(e) {
  return Object.keys(e).sort().map((function(t) {
      var n = e[t];
      if (null != n) {
        var r = l(t);
        if (r)
          return Array.isArray(n) ? "".concat(r, "=").concat(n.map(l).sort().join("&".concat(r, "="))) : "".concat(r, "=").concat(l(n))
      }
    }
  )).filter((function(e) {
      return e
    }
  )).join("&")
}
  , a = function(e, t) {
  return cryptoJs.HmacSHA256(t, e)
  // return cryptoJs.HmacSHA256.apply(cryptoJs, [...arguments].reverse())
};

export default class DyHelper {
  request: DyHelperRequest | undefined = undefined
  serviceName: string
  signatureCache: boolean = true
  constructor(request: DyHelperRequest, serviceName: string) {
    this.request = request
    this.serviceName = serviceName
  }
  addAuthorization(e: any, t: any): RawAxiosRequestHeaders {
    var n = typeof t === "string" ? t : this.iso8601(t).replace(/[:\-]|\.\d{3}/g, "");
    this.addHeaders(e, n)
    this.request.headers.Authorization = this.authorization(e, n)
    return this.request.headers
  }
  addHeaders(e, t) {
    this.request.headers["X-Amz-Date"] = t
    e.sessionToken && (this.request.headers["x-amz-security-token"] = e.sessionToken)
    var s = cryptoJs.SHA256
    this.request.body && (this.request.headers["X-Amz-Content-Sha256"] = s(JSON.stringify(this.request.body)).toString())
  }
  iso8601(e: Date) {
    return void 0 === e && (e = new Date),
      e.toISOString().replace(/\.\d{3}Z$/, "Z")
  }
  authorization(e: any, t: string) {
    var n = []
      , r = this.credentialString(t);
    return n.push("".concat("AWS4-HMAC-SHA256", " Credential=").concat(e.accessKeyId, "/").concat(r)),
      n.push("SignedHeaders=".concat(this.signedHeaders())),
      n.push("Signature=".concat(this.signature(e, t))),
      n.join(", ")
  }

  credentialString(e: string) {
    return this.createScope(e.substr(0, 8), this.request.region, this.serviceName)
  }

  createScope(e, t, n) {
    return [e.substr(0, 8), t, n, c].join("/")
  }

  signedHeaders() {
    var e = this
      , t = [];
    return Object.keys(this.request.headers).forEach((function(n) {
        n = n.toLowerCase(),
        e.isSignableHeader(n) && t.push(n)
      }
    )),
      t.sort().join(";")
  }

  isSignableHeader(e: string) {
    const A = ['authorization', 'content-type', 'content-length', 'user-agent', 'presigned-expires', 'expect', 'x-amzn-trace-id']
    return 0 === e.toLowerCase().indexOf("x-amz-") || A.indexOf(e) < 0
  }

  signature(e: any, t: string) {
    var n = this.getSigningKey(e, t.substr(0, 8), this.request.region, this.serviceName)
      , r = this.stringToSign(t);
    // console.log(`signature---n: ${n.toString()}`)
    // console.log(`signature---r: ${r}`)
    return a(n, r).toString()
  }

  getSigningKey(e, t, n, r) {
    const c = "aws4_request"
    // 算法是 cryptoJs.HmacSHA256 前后参数交换了一下
    // var a = function(x, y) {
    //   return cryptoJs.HmacSHA256.apply(cryptoJs, [...arguments].reverse())
    // }
    var i = a("AWS4".concat(e.secretAccessKey), t)
    var o = a(i, n)
    var s = a(o, r);
    return a(s, c)
  }
  stringToSign(e: string) {
    var t = [];
    return t.push("AWS4-HMAC-SHA256"),
      t.push(e),
      t.push(this.credentialString(e)),
      t.push(this.hexEncodedHash(this.canonicalString())),
      t.join("\n")
  }
  canonicalString() {
    var e = []
      , t = this.request.pathname || "/";
    return e.push(this.request.method.toUpperCase()),
      e.push(t),
      e.push(u(this.request.params) || ""),
      e.push("".concat(this.canonicalHeaders(), "\n")),
      e.push(this.signedHeaders()),
      e.push(this.hexEncodedBodyHash()),
      e.join("\n")
  }

  canonicalHeaders() {
    var e = this
      , t = [];
    Object.keys(this.request.headers).forEach((function(n) {
        t.push([n, e.request.headers[n]])
      }
    )),
      t.sort((function(e, t) {
          return e[0].toLowerCase() < t[0].toLowerCase() ? -1 : 1
        }
      ));
    var n = [];
    return t.forEach((function(t) {
        var r = t[0].toLowerCase();
        if (e.isSignableHeader(r)) {
          var i = t[1];
          if (null == i || "function" != typeof i.toString)
            throw new Error("Header ".concat(r, " contains invalid value"));
          n.push("".concat(r, ":").concat(e.canonicalHeaderValues(i.toString())))
        }
      }
    )),
      n.join("\n")
  }

  canonicalHeaderValues(e) {
    return e.replace(/\s+/g, " ").replace(/^\s+|\s+$/g, "")
  }

  hexEncodedBodyHash() {
    return this.request.headers["X-Amz-Content-Sha256"] ? this.request.headers["X-Amz-Content-Sha256"] : this.request.body ? this.hexEncodedHash(u(this.request.body)) : this.hexEncodedHash("")
  }

  hexEncodedHash(str: string) {
    return cryptoJs.SHA256(str).toString()
  }

  static getPathByURL(e: string) {
    return /^(?:(https?\:)\/\/)?(([^:\/?#]*)(?:\:([0-9]+))?)([\/]{0,1}[^?#]*)(\?[^#]*|)(#.*|)$/.exec(e)[5] || "/"
  }

  static getBufferHash(part: Buffer): string {
    var xe = function(e, t) {
      // @ts-ignore
      for (var n = [0, 1996959894, 3993919788, 2567524794, 124634137, 1886057615, 3915621685, 2657392035, 249268274, 2044508324, 3772115230, 2547177864, 162941995, 2125561021, 3887607047, 2428444049, 498536548, 1789927666, 4089016648, 2227061214, 450548861, 1843258603, 4107580753, 2211677639, 325883990, 1684777152, 4251122042, 2321926636, 335633487, 1661365465, 4195302755, 2366115317, 997073096, 1281953886, 3579855332, 2724688242, 1006888145, 1258607687, 3524101629, 2768942443, 901097722, 1119000684, 3686517206, 2898065728, 853044451, 1172266101, 3705015759, 2882616665, 651767980, 1373503546, 3369554304, 3218104598, 565507253, 1454621731, 3485111705, 3099436303, 671266974, 1594198024, 3322730930, 2970347812, 795835527, 1483230225, 3244367275, 3060149565, 1994146192, 31158534, 2563907772, 4023717930, 1907459465, 112637215, 2680153253, 3904427059, 2013776290, 251722036, 2517215374, 3775830040, 2137656763, 141376813, 2439277719, 3865271297, 1802195444, 476864866, 2238001368, 4066508878, 1812370925, 453092731, 2181625025, 4111451223, 1706088902, 314042704, 2344532202, 4240017532, 1658658271, 366619977, 2362670323, 4224994405, 1303535960, 984961486, 2747007092, 3569037538, 1256170817, 1037604311, 2765210733, 3554079995, 1131014506, 879679996, 2909243462, 3663771856, 1141124467, 855842277, 2852801631, 3708648649, 1342533948, 654459306, 3188396048, 3373015174, 1466479909, 544179635, 3110523913, 3462522015, 1591671054, 702138776, 2966460450, 3352799412, 1504918807, 783551873, 3082640443, 3233442989, 3988292384, 2596254646, 62317068, 1957810842, 3939845945, 2647816111, 81470997, 1943803523, 3814918930, 2489596804, 225274430, 2053790376, 3826175755, 2466906013, 167816743, 2097651377, 4027552580, 2265490386, 503444072, 1762050814, 4150417245, 2154129355, 426522225, 1852507879, 4275313526, 2312317920, 282753626, 1742555852, 4189708143, 2394877945, 397917763, 1622183637, 3604390888, 2714866558, 953729732, 1340076626, 3518719985, 2797360999, 1068828381, 1219638859, 3624741850, 2936675148, 906185462, 1090812512, 3747672003, 2825379669, 829329135, 1181335161, 3412177804, 3160834842, 628085408, 1382605366, 3423369109, 3138078467, 570562233, 1426400815, 3317316542, 2998733608, 733239954, 1555261956, 3268935591, 3050360625, 752459403, 1541320221, 2607071920, 3965973030, 1969922972, 40735498, 2617837225, 3943577151, 1913087877, 83908371, 2512341634, 3803740692, 2075208622, 213261112, 2463272603, 3855990285, 2094854071, 198958881, 2262029012, 4057260610, 1759359992, 534414190, 2176718541, 4139329115, 1873836001, 414664567, 2282248934, 4279200368, 1711684554, 285281116, 2405801727, 4167216745, 1634467795, 376229701, 2685067896, 3608007406, 1308918612, 956543938, 2808555105, 3495958263, 1231636301, 1047427035, 2932959818, 3654703836, 1088359270, 936918e3, 2847714899, 3736837829, 1202900863, 817233897, 3183342108, 3401237130, 1404277552, 615818150, 3134207493, 3453421203, 1423857449, 601450431, 3009837614, 3294710456, 1567103746, 711928724, 3020668471, 3272380065, 1510334235, 755167117], r = ("undefined" != typeof Int32Array && (n = new Int32Array(n)),
      -1 ^ ~~t), i = (e = new Uint8Array(e)).length, o = 0; o < i; o++)
        r = n[255 & (r ^ e[o])] ^ r >>> 8;
      return (-1 ^ r) >>> 0
    }
      , De = function(e) {
      if (void 0 !== e)
        return function e(t) {
          return t.length < 8 ? e(t = "0".concat(t)) : t
        }(Number(e).toString(16))
    };
    return De(xe(part, 0))
  }
}